Junkrat is a shield spammer, he has a HUGE body and his projectiles can’t deal headshots or go too far.
Makes sense such a hero with these traits will be able to take down someone who tries to get in his face.
After all, shields are huge bodies and so is someone in his face.
If the enemy don’t respect Junkrat and play in a choke or up close it’s fair Junkrat will have the upper hand.